No study in the world will change the fact that the only time any computer in our house has gotten a virus, it was the one computer that consistently used IE. (It was fairly old, and no longer worked with up-to-date versions of Firefox). Also, while none may be inherently more secure than the others, it's certainly easier to install add-ons that increase security on Chrome and Firefox.
The potential invasion of privacy from Chrome would only bother me if I did anything worth hiding. The only things I regularly use the internet for are this, Facebook, fantasy football, youtube, and webcomics. And I honestly don't care if anyone can know that.
Also relevant: this.